Improvement in railway-car brakes



UNITED STATES PATENT OEEroE.

JOHN W. MOGLASHAN, OF MONTREAL, CANADA.

Specification forming part of Letters Patent No. 117,190, dated July 18,1871.

To all whom fit may concern:

Be it known that I, J OHNFW. MCGLASHAN, of Montreal, in the Province ofQuebec and Dominion of Canada, have invented a new and usefulImprovement in Gar-Brakes; and I do hereby declare that the following isa full,'clear, and eX- act description thereof, which will enable othersskilled in. the art to make and use the same, reference being had to theaccompanying drawing forming part of this specification.

This invention consists in a new and useful improvement in brakes forrailroad cars; and consists in the construction of a friction-wheelwhereby it is adapted to lock onto the axle for the purpose ofpreventing the brakes being applied with undue force. This device ishereinafter described in connection with others neces sary to itsperfect operation or to constitute a complete brake apparatus.

In the accompanying drawing, Figure 1 represents a vertical longitudinalsection of a car provided with my improved brake, the section .beingtaken on the line :v a: of Fig. 2, looking as indicated by the arrow.Fig. 2 is a view of the under side of the car, the car being reversed inorder to show the brake to better advantage.

Similarletters of reference indicate corresponding parts.

A is the car-frame. B represents the car-axles5 C, the wheels; l), thebrake-beams; E, the shoes on the ends of the beams. F is the brake-bar,which has its fulcrum on the cross-timber G at the point H. I I are therods which connect the lever with the brake-beams. J is a lever hung inbrackets L L, and carrying in its forked and bent end the friction-wheelM and chain-drum N, which are mounted on a short shaft arranged parallelto the axle. O is a chain connecting the drum N and bar F. The brakesare applied throughout the train by the chain or cord I), which issupported from the roof of the car and connected with the lever by ajointed bar, Rf, rod S, and pulleys T V.

By pulling down on any portion of the cord, or by pulling it endwise ineither direction, the ends of all the levers J will be drawn upward,

which will apply the brakes simultaneoipshlyh throughout the train. Byreleasing or loosening the cord the ends of the working-levers drop downby their own gravity and the brakes are simultaneously released from thewheels.

W is a groove in the face of the friction-wheel M, which allows thewheel to lock onto the axle. This, of course, stops the revolution ofthewheel and drum, and prevents the brakes being applied with greater forcethan is necessary, a single revolution or less being suflicient to applythe brakes with great force.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The groove Win the friction-wheel, substantially asand for the purposes described.

JOHN W. MGGLASHAN.

Vitncsses GEORGE CARTER, of Montreal,

Notarial Olcrlc. J. S. HUNTER, of Montreal,

Notary Publ/lc.

